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Flowmaster 817412 American Thunder Crossmember-Back Dual Exhaust System

(Chevrolet Malibu 1964-67, Chevelle 1964-67, El Camino 1964-67; Pontiac GTO 1964-67, Grand Prix 1964-67, LeMans 1964-67, Tempest 1964-67 + 10 more models)

Part of: Flowmaster American Thunder Crossmember-Back Dual Exhaust System

Other options in this family: Flowmaster 817654 Flowmaster 817200 Flowmaster 817174 Flowmaster 17282 Flowmaster 817937

Manufacturer

Picture for manufacturer Flowmaster

Part Number

817412
7 reviews
Sale Price

$949.95

In Stock (10+)

delivery box

Usually delivered within 2 days

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Fitment guaranteed

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Product Details

The Flowmaster American Thunder Crossmember-Back Exhaust System delivers an aggressive, powerful sound with true dual exhaust performance. This complete cat-back system features premium mandrel-bent 16-gauge stainless steel tubing that maintains consistent diameter throughout each bend, maximizing exhaust flow and horsepower gains while ensuring long-lasting durability.

Key Features:

  • True dual crossmember-back exhaust configuration for maximum performance
  • Super 40 Series mufflers deliver Flowmaster's signature deep, aggressive exhaust tone
  • H-pipe crossover design balances exhaust pulses for increased power and deeper sound
  • Mandrel-bent 16-gauge stainless steel tubing for superior flow and corrosion resistance
  • Moderate to aggressive exterior sound level perfect for enthusiasts
  • Complete system includes all necessary hangers and hardware for installation
  • Backed by Flowmaster's Lifetime Limited Warranty

This American Thunder system combines performance engineering with that classic Flowmaster sound, making it an excellent choice for truck and SUV owners seeking enhanced exhaust tone without sacrificing quality or durability. The stainless steel construction ensures years of reliable service, while the precision-bent tubing and H-pipe design work together to extract maximum performance from your vehicle.

Products specifications

Fits

Chevrolet Malibu 1964-67, Chevelle 1964-67, El Camino 1964-67; Pontiac GTO 1964-67, Grand Prix 1964-67, LeMans 1964-67, Tempest 1964-67; Buick LeSabre 1964-67, Skylark 1964-67, Special 1964-67, Gran Sport 1965-67, Sportwagon 1964-67 + 5 more models

Brand

Flowmaster

Prop 65

Yes

California Proposition 65 Chemical Name

Chromium (hexavalent compounds)

California Proposition 65 Chemical Name

Nickel (Metallic)

Catalytic Converter Quantity

0

Category

Exhaust

Clamping Type

Flat Band

Clamps Included

Yes

Drive

2WD

Emission Code

5

Exhaust Series

American Thunder

Exhaust Tip Connection

Clamp-On

Exhaust Tip Quantity

Sold Separately

Exhaust Tip Quantity

0

Exhaust Tip Shape

Round

Exit Style

Dual Out Rear

Exit Style

Dual Out Side

Finish

Natural

Gasket Or Seal Included

No

Grade Type

Performance

Hangers Included

Yes

Heat Shield Included

No

Inlet Diameter

2.50

Inlet Type

Weld-On

Mounting Bracket Included

Yes

Muffler (Left) Body Width

10.00

Muffler (Left) Type

Chambered

Muffler (Right) Type

Chambered

Muffler Body Material

409 Stainless Steel

Muffler Body Shape

Oval

Muffler Finish

Black High-Temperature Paint Finish

Muffler Flanged Inlet

No

Muffler Flanged Outlet

No

Muffler Inlet Connection

Slip-Fit

Muffler Outlet Connection

Slip-Fit

Muffler Outlet Quantity

1

muffler part number

Kit Only

Muffler Quantity

2

Muffler Series

Super 40 Series

Muffler Type

Chambered

Pipe Color

Silver

Pipe Material

409 Stainless Steel

Product Type

Exhaust System

Sound Level

Aggressive / Moderate

Spring Bolt Kit Included

No

Sub Category

Exhaust and Tail Pipes

Tail Pipe Quantity

Dual

Tail Pipe Quantity

2

Tail Pipe Tapered Outlet

No

Type

Crossmember-Back

Valve Included

No

Valve Type

Not Applicable

Warning

California Proposition 65

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